Synthetic Double-layered FlyKnit upper Reflective Detailing Defender Repellent Systems 100% authentic. The Nike weatherized holiday collection is here with reimagined sneakers featured with rugged interpretations of the original outsole and lining making the shoes as comfortable as their counterparts, but with weather-wise and reflective benefits. The Nike Flyknit Chukka SneakerBoot is constructed from a double layer FlyKnit upper, mixed with wool for maximum warmth and comfort. Shipping Information: View shipping rates and policies ASIN: B019YQP0NC Date first: December 30, 2015